Returning List and Scalars There are a number of methods of Query object that immediately issue SQL and return a value containing loaded database results. Here’s a brief rundown of returning list and scalars − all() It returns a list. Given below is the line of code for all() function. session.query(Customers).all() Python console displays following […]
Category Archives: sqlalchemy
Using DELETE Expression In the previous chapter, we have understood what an Update expression does. The next expression that we are going to learn is Delete. The delete operation can be achieved by running delete() method on target table object as given in the following statement − stmt = students.delete() In case of students table, […]
Using Multiple Table Updates In the previous chapter, we have discussed about how to use multiple tables. So we proceed a step further and learn multiple table updates in this chapter. Using SQLAlchemy’s table object, more than one table can be specified in WHERE clause of update() method. The PostgreSQL and Microsoft SQL Server support […]